石墨烯-TiO2复合材料可见光催化降解乙黄药  

The Degradation of Ethyl Xanthate with the Visible-light Photocatalytic Oxidation of Graphene-TiO2

作　　者：张明慧 崔石岩 刘凤春[1] 高恩霞 李梦红[1] 蒋曼[1] Zhang Minghui;Cui Shiyan;Liu Fengchun;Gao Enxia;Li Menghong;Jiang Man(School of Resources and Environmental Engineering,Shandong University of Technology,Zibo 255049,China;Shandong Zhaoyuan Technology Co.Ltd.,Zhaoyuan 265400,China)

机构地区：[1]山东理工大学资源与环境工程学院,山东淄博255049 [2]山东招远科技有限公司,山东招远265400

出　　处：《金属矿山》2020年第2期129-133,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:51804188,41771348);山东省自然科学基金项目(编号:ZR2018BEE015)。

摘　　要：以石墨烯-TiO2复合材料为光催化剂,可见光条件下催化氧化降解硫化矿选矿模拟废水中残余乙黄药,分析了不同种类光催化材料、溶液pH值、光催化时间、乙黄药初始浓度等因素对催化氧化降解效果的影响,并对光催化材料可重复利用性进行了评价。结果表明:在乙黄药初始浓度为20 mg/L、初始pH=6.8、复合材料用量为0.3 g/L、反应时间为120 min,氙灯模拟可见光的试验条件下,模拟废水中乙黄药降解率可达到94.54%,制备的高性能复合材料重复利用4次仍有较好的光催化活性。紫外光谱仪在200~400 nm波长范围内扫描对光催化氧化过程进行了表征,结果表明:乙黄药光催化氧化降解过程中有过黄药产生,然后过黄药在光催化剂作用下将继续氧化成其他物质。The degradation of residual xanthate in the sulfide ore processing wastewater treated was studied by photo-catalytic oxidation method with graphene-Ti O2 composite material. The processing parameters,including the types of cata-lysts,p H value,reaction time,ethyl xanthate concentration,and the reusability of catalyst were optimized and the best re-sult was obtained. The experimental results showed that when the initial xanthate concentration was 20 mg/L at an initial p Hof 6.8,the graphene-Ti O2 dosage was 0.3 g/L,stirring for 120 min under the condition of visible light with xenon lamp,andthe final degradation rate of xanthate could reach 94.54%. The graphene-Ti O2 was reused for 4 times,and still had a greatphotocatalytic activity. UV-vis wave length scanned from 200 to 400 nm had been carried out in the photocatalytic oxidationprocess of ethyl xanthate. Results showed that in the process of visible light catalytic degradation, ethyl xanthate would be ox-idized into peroxide xanthate, and then which would continue the oxidation in the presence of photocatalyst.

关 键 词：乙黄药 硫化矿选矿废水 光催化氧化法 二氧化钛 

分 类 号：X751.03[环境科学与工程—环境工程] TD926.5[矿业工程—选矿]